Boilee tubes



(No Model.)

E. J MOORE.

MEANS POR CLOSING BOILBR TUBES.

Patented June 5, 1883.

WIT NEEE'EE UNITED STATES PATENT OFFICE.

EDVARD J. MOORE, OF BALTIMORE, MARYLAND.

MEANS FOR- CLOSING BOILERTUBES.

SPECIFICATION forming part of Letters Patent No. 278,998, dated June 5, 1883.

\ Application filed March 14, 1883. (No modeL) To all whom it may concern.-

Be it known that I, EDWARD J. MOORE, of the city of Baltimore, and State of Maryland, have invented certain Improvements in Means for Closing Boiler-Tubes, of which the following is a specification.

This invention relates to means for closing the ends of tubes, andparticularly tubes used in sectional steam-boilers.

The said invention consists in combining with a tube the end of which is out so as to present, practically, a square edge a closingcap having an annular V-groove, into which the end ofthe said tube is inserted, and a bolt and nut to force the tube and cap closely in contact to form a tight joint, as hereinafter more particularly described.

In the accompanying drawings, forming a part hereof, Figure I is a sectional view of a part of a sectional boiler leg and tube, the latter being closed in accordance with my invention. Fig. II is an inside view of the cap. Figs. IIIand IV illustrate certain modifications in the construction of the cap.

Similar letters of reference indicate similar parts in all the views. l

A is a part oi' a sectional boiler-leg, which is shown as consisting of tw'o plates, a., separated by a space, 1).

B is a tube which passes through the plates or sheets a, in which it is expanded.

C is a cap having an-annular V-groove, c, which is forced in contact with the end of the tube B by means of a bolt, d, and nute. In Fig. I the bolt d is of the anchor description, and secures the cap to the tube independently ofthe cap at the other end of the tube, while in Figs. III and IV the bolt is intended to pass entirely through the tube and secure two caps.

In Figs. I, II, and III the groove c is of a 4o strictly V-shape; but the apex of the angle is of no value, as it is not in contact with thc tube. The groove can therefore be of circular or nearly circular shape, as shown in Fig. IV, which gives two points of contact with the 4 5 tube, and forms two joints,as in the V-groove.

It will be understood that the principal advantage of the invention consists in that when the groove and the tube are brought to the proper diameters no difficulty is experienced in 5o forming a water and steam tight j oint with only a slight strain on the bolt, as the sharp angles 011 the tube end readily conform to the grooved surface of the cap. Ifpreferred, the nut e may be a part of the cap C.

I claim as my invention.

1. In combination with atube with a squarefaced end or edge, a cap having an annular groove, which presents an angular surface to the edge of the tube, and a bolt and nut to 6o force the cap and tube Vclosely in contact to forni a tight joint, substantially as specified.

2. A sectional boiler -tube which extends through a water-leg and is secured within the two walls or plates of the same, as described, 65 having a square-faced end or edge, combined with a closing cap having an annular V-groove, into which the end of the said tube is inserted, and a bolt and nut to force the cap and tube closely in contact to forni a water-tight joint, 7o

substantially as specified.

EDXVARD J. MOORE.

Vitnesses:

EDW. J. Drees, WM. T. HOWARD. 

